In flame tests salts that are dissolved in water are evaporated using a hot flame. In the flame the metal atoms become excited and produce their characteristic spectrum of light. Hope this answers the question. Have a nice day. Feel free to ask more questions.
Answer:
D. The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
PV = nRT
T
=
PV
nR
=
1.0 atm × 0.5 L
3.5 mol × 0.0821 L atm / (mol K)
=
1.74 K
Answer:
0.3 moles /liter
Explanation:
The molar mass of Fe(NO3)3.9H2O is 403.99
40.4 g of Fe(NO3)3.9H2O is approximately equivalent to 40.4/404.4 = 0.1 moles
As each unit of the hydrated iron nitrate contributes one unit of iron(3) ions, the concentration of iron(3) ions in the solution is 0.1 moles/liter.
As each unit of the hydrated iron nitrate contributes 3 units of nitrate ions, the concentration of nitrate ions if 0.3 moles/liter.
Answer:
I think C option ✔️ ✔️ correct